Link Mauve authored Sep 29, 2019 and Philipp Hörist committed Sep 29, 2019

In order to work on every system Gajim runs on (instead of only X11),
this new widget uses GTK+ Gstreamer elements.

It currently completely breaks the actual Jingle thing, but that was
already pretty broken so will be fixed in a later commit.

It might be nice to think about the way we want to make preferences
interact with a currently-running audio/video session, since it
currently uses a separate pipeline and thus will conflict when e.g. both
will want to access the same camera device, if the OS doesn’t implement
multiplexing (Linux doesn’t).